Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dao thuoc » cao thuoc, tao thuoc, dang thuoc
khoa than » khoa luan, hoa thai, hoa tan
hoa phan » hoa dan, co phan
khoa thu » hoai thu, ho thu
te lanh » te danh, tu lanh, tren lanh
te lan » te luan, te ban, te lai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te lanh) OR (te lan)) dao thuoc sach ((((hoa phan) or (khoa thu))) or (khoa than)) thong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te lanh) OR (te lan)) dao thuoc sach ((((hoa phan) OR (khoa thu))) OR (khoa than)) thong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te lanh) OR (te lan)) dao thuoc sach ((((hoa phan) or (khoa thu))) or (khoa than)) thong".
• Adding a wildcard symbol may retrieve word variants: ((te lanh) OR (te lan)) dao thuoc sach ((((hoa phan) or (khoa thu))) or (khoa than)) thong*.